In short: Two or more passed pawns on neighboring files. They can protect each other as they advance and are very hard to stop.
A passed pawn has no enemy pawns in front of it. When two passed pawns stand on neighboring files they are called connected. When one advances, the other can protect it, and together they can get past pieces that would have stopped a lone pawn.
Two pawns against a rook
Connected passed pawns grow more dangerous with every step. Once they have reached the sixth rank they can beat a rook, if the kings are far away: when the rook attacks one pawn, the other moves on.
It doesn't always work. If the kings are close, or the pawns haven't come as far, the rook may be in time to stop them. Read more about rook endgames.
Protected passed pawn
A passed pawn protected by a pawn of its own is called a protected passed pawn. It is very strong in the endgame. The opponent's king can't take it, because it is protected. And if the king takes the pawn behind it, the passed pawn runs and becomes a queen. So the king is tied to guarding it and has no time for anything else.
An exception. In endgames with opposite-colored bishops, connected pawns rarely help. The defender can blockade them on the squares the attacker's bishop can't reach.
Frequently asked questions
Do two pawns always beat a rook?
No. It depends on how far the pawns have come and where the kings stand. Two connected passed pawns on the sixth rank often beat a rook when the kings are far away.
What is a protected passed pawn?
A passed pawn that is protected by a pawn of its own. The opponent's king can't take it, and if the king takes the pawn behind it, the passed pawn runs.
Updated November 14, 2026